共查询到20条相似文献，搜索用时 109 毫秒
1.
分析了宿迁市水稻生产现状和高产潜力,针对目前水稻生产中存在农户种植规模偏小、土壤质地和肥力分布不均,产量不平衡、自然灾害频发、直接从事农业技术推广的人才太少,稻农文化素质低等资源条件限制因素和水稻主导品种不突出、水稻栽培技术创新与推广普及力度不强、水稻种植机械化发展较慢、水稻生产科技投入不足等技术障碍,提出加快"籼改粳"步伐,充分发挥粳稻增产潜力、推进水稻机插秧技术普及,提高种稻效益、培肥地力,提高水稻高产超高产实现的概率、加强优质高产抗病专用水稻新品种选育引进、加强水稻高产优质高效安全生态的生产技术体系研究与推广等实现"9000攻坚"技术途径和加大资金投入、提高农田生产能力、提高水稻高产超高产技术的支撑能力、加强技术推广服务体系建设、注重考核,改进管理等政策建议。 相似文献
2.
3.
水稻主要病虫害防治技术 总被引：1，自引：0，他引：1
介绍了稻瘟病、水稻纹枯病、水稻白叶枯病、稻曲病、稻水象甲、水稻二化螟、稻飞虱等在水稻生产过程中主要影响水稻产量的几种病虫害的防治技术.对水稻病虫害的防治要以预防为主,勤观察、早发现、早防治,进行综合防治,以保障水稻优产、高产. 相似文献
4.
杂交水稻高产栽培研究进展 总被引：1，自引：0，他引：1
高产栽培理论与技术对于提高杂交水稻产量有着重要意义。优化杂交水稻群体质量,扩大杂交水稻库容量,提高光合叶面积指数和光能利用率,增强杂交水稻根系活力,延缓根系和叶片衰老,提高杂交水稻库容的有效充实度,可实现杂交水稻高产。杂交水稻高产栽培实践中形成了以精确定量栽培、强化栽培、三定栽培为代表的等高产栽培技术体系。杂交水稻高产栽培也存在栽培技术与我国农村发展不适应,以及与农业生态环境保护不很好协调的矛盾。精准化栽培、生态化栽培和轻简栽培将是我国今后水稻生产发展急需技术。 相似文献
5.
云南省水稻生产现状及绿色发展对策 总被引：2，自引：0，他引：2
云南是农业大省,水稻是云南省最主要的粮食作物。针对水稻生产中存在的“生产成本快速增长、成本利润率快速下降、种稻效益低下、稻米自给率较低、品牌影响力不够、优质多抗高产品种供给不足、水稻机械化程度较低、水稻绿色高产高效栽培和施肥技术欠缺”等一系列制约水稻绿色发展的瓶颈,从“稳定水稻种植面积,提高种稻比较效益,加大绿色高效的优质多抗高产新品种选育与应用,研究与应用全程机械化技术、化肥农药减量增效技术和稻田种养结合技术”等方面提出对策建议,确保云南稻米安全,打造云南高原特色的绿色稻米产业,促进云南水稻产业的绿色持续稳定发展。 相似文献
6.
介绍了水稻免耕高产栽培技术,包括直播前准备,播种、水稻免耕育秧技术、合理密植、苗期管理,水分管理、施肥、病虫防治、适时收获等方面的内容。为推广水稻免耕高产栽培技术提供参考。 相似文献
7.
介绍了2009—2011年将乐县开展水稻高产创建活动所取得的实效及组织措施,通过加强技术指导与培训、抓好＂五新工程＂等措施来推广高产优质的水稻品种和水稻高产群体调控增产增效措施,从而实现增产增收的目的。 相似文献
8.
9.
按照无公害水稻生产的相关标准,结合国家水稻高产创建项目的有关要求及盘锦稻区的水稻生产现状,从品种选择、本田整地、育苗、移栽、施肥、灌水、病虫草害防治、收获等方面提出了盘锦稻区水稻高产创建百亩核心区的生产技术措施。 相似文献
10.
11.
Textile fibers were obtained from secondary polyethylene terephtalate (PET) and its mixtures with primary PET at initial orientation of 18000–33000 %, rate of additional orientation drawing 3.5–6.5 times and temperature of thermal fixation 363–413 K. The fibers’ tensile strength was found to decrease and elongation at break to increase with the decrease of their linear density under the conditions of fibers formation. For the fibers based on polymer mixtures, the presence of oxidized fragments in the secondary PET limited the compatibility of the two polymers which resulted in deteriorated tensile properties. The linear density (4–16 dtex), tensile strength (30–50 cN/tex) and elongation at break (20–60 %) of the PET fibers obtained were close to these for the industrially produced polymer fibers. The values of the average diameter of the fibers formed and oriented under laboratory conditions allows classifying them between the fine and the coarse textile fibers which makes them suitable for the textile industry. 相似文献
12.
13.
Gas-exchange characteristics of potato (Solanum tuberosum L.) canopies were determined with crop enclosures under condition of optimal water supply, during soil water depletion, and during recovery from drought-stress. The plants were grown under a rainshelter in large containers with 2-m2 surface area. Control plants received water throughout the growth period. In Expt. 1, transient drought was imposed by interrupting water supply completely for 22 days. During the 33-day period of drought treatment in Expt. 2, the stressed plants received half the amount of water that was given to the control plants (irrigations 2–3 times per week).
During soil water depletion, stomatal conductance of the canopy was reduced earlier and more than photosynthesis. This resulted in a lower internal carbon dioxide concentration in the leaves of stressed plants and a higher ratio between photosynthesis and stomatal conductance. The value of that ratio increased as soil water potential dropped.
Water-use efficiency ( ) increased during drought stress. The cultivar Bintje showed a larger ratio between photosynthesis and stomatal conductance of the canopy and a higher than cv. Saturna, both for optimal water supply and during drought stress.
Photosynthesis and conductance of the canopy started to recover immediately upon rewatering, even when relative values had declined to 20–30% during the preceding stress period. After release from stress, the leaves in the top layer of the canopy had a higher stomatal conductance in treated plants than in control plants. 相似文献
14.
2017—2018年,在同安镇粮食产能区示范推广水稻病虫害绿色防控与统防统治融合技术模式,取得了显著成效。融合技术示范区比常规区减少用药2~3次,用药量减少37.6%,防治成本降低400元/hm^2;水稻产量增加12.8%,收益增加2 835元/hm^2。 相似文献
15.
16.
17.
《Journal of Crop Improvement》2013,27(1):313-324
Summary Arbuscular mycorrhizae were inoculated into phosphorus-deficient soil fertilized with either organic or chemical fertilizer with cucumber (Cucumis sativus L.) as the first crop and lettuce (Lactu-ca sativa L.) as the second crop but without additional fertilization and AM inoculation. AM increased dry matter and fruit yield of cucumber significantly in the unfertilized, organic-fertilized and P-deficient plants compared with the fully chemical-fertilized plants. AM inoculation increased the available phosphorus in plant and soil by around 30% for all treatments except for those chemically-fertilized. The rate of AM infection did not differ significantly among the fertilization treatments, but the infection intensity was higher in unfertilized, organic-fertilized and phosphorus-deficient treatments than chemical-fertilized treatment. The residual effects of AM-inoculated to cucumber were evident for lettuce in all pre-treatments that were unfertilized and un-inoculated for the second cropping. Without P-fertilization, neither crop could grow optimally even when the soil was inoculated with AM, suggesting that AM could not serve as a substitute for phosphorus fertilizer. However, the other beneficial effects of AM on crop growth and yield could not be fulfilled with phosphorus fertilizer. 相似文献
18.
生物质能作物——甘薯开发利用现状及趋势 总被引：13，自引：0，他引：13
甘薯是世界上重要的粮食、饲料、工业原料及新型能源用块根作物，在我国乃至世界再生能源开发中起到重大作用，其分布地域广，适应性强，沙荒地、岗坡地均可种植。生物产量高，而且种植栽培容易。甘薯含淀粉15％～30％，晒干率20％～35％，世界各国以薯干或淀粉为原料生产乙醇有着悠久的历史。随着全球能源的日趋紧张，乙醇作为一种可再生的环保燃料．将快速步入全球成品油市场，在替代汽油供应方面起到越来越大的作用。各国正在推行或制定燃料乙醇计划，并着眼于生物燃料乙醇应用方案，认为甘薯可能是摆脱将来粮食和能源危机的“最后一张王牌”。 相似文献
19.
20.
施镁量和施镁方法对烤烟生长发育和烟叶产量的影响 总被引：4，自引：0，他引：4
采用盆栽试验，研究施镁量和施镁方法对烤烟生长发育和烟叶产量的影响，结果表明：适量施用镁肥，可以促进烟草的生长发育、改善其农艺学性状，影响烟株对其它营养元素的吸收与积累，提高烟叶产量，并能使烟叶N，P，K，Ca等营养元素含量更趋协调。随着施镁量的增加，烟叶中镁含量提高10．7％～71．4％，烤烟单株吸镁量、叶片叶绿素含量、干物质产量分别提高17．6％～115．4％，1．9％～23．ooA和6．3％～25．7％，而对烟叶含钾量没有明显影响。在镁比较缺乏的土壤上，镁肥作基肥施比叶面喷施的效果好，基肥施镁结合叶面喷镁的效果最佳；叶面喷镁，肥料用量少、成本低、见效快，是一种有效的镁肥施用方法；提高镁肥用量，施镁的效果更加显著。 相似文献